Question

$25m ^{2} - 40mn + 10n^{2}$
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Answer 1

Coefficient in 5xyz2 is 5 and in -3zy is -3.

(ii) Terms: 1, x and x2.

Coefficient of x and coefficient of x2 is 1.

(iii) Terms: 4x2y2, -4x2y2z2 and z2.

Coefficient in 4x2y2 is 4, coefficient of -4x2y2z2 is -4 and coefficient of z2 is 1.

(iv) Terms: 3, -pq, qr and -rp

Coefficient of -pq is -1, coefficient of qr is 1 and coefficient of -rp is -1.

(v) Terms:

Coefficient of Coefficient of and coefficient of -xy is -1.

2. (i) Since x + y contains two terms